add addField() method to DataForm API
add addField() method to DataForm API

sourcebits-praveenkh/Tagase,caiyingyuan/tigase71,amikey/tigase-server,caiyingyuan/tigase71,sourcebits-praveenkh/Tagase,sourcebits-praveenkh/Tagase,caiyingyuan/tigase71,caiyingyuan/tigase71,amikey/tigase-server,sourcebits-praveenkh/Tagase,amikey/tigase-server,sourcebits-praveenkh/Tagase,amikey/tigase-server,sourcebits-praveenkh/Tagase,amikey/tigase-server,caiyingyuan/tigase71,caiyingyuan/tigase71,amikey/tigase-server